Pradeep Kumar

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SEMINAR ON BLU RAY DISC
Pradeep Kumar
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CONTENTS

• Introduction
• Characteristics of Blu-ray disc
• Specification of Blu-ray disc
• Comparision of storage technologies
• Applications
• Conclusion

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INTRODUCTION

• Blu-ray (BD) is a next-generation optical disc
  format.
• The format was developed to enable recording,
  rewriting and playback of high-definition video
  (HD), as well as storing large amounts of data.
• The companies that have jointly established the
  BD specifications are
• Hitachi, Ltd
• LG Electronics
• Matsushitha Electrical Industrial Co. Ltd
• Mitsubishi Electric Corporarion

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(Contd)

• Pioneer Corporation
• Samsung Electronics Co. Ltd
• Sony
• Thomson
• Royal Phillips Electronics
• Sharp Corporation
• The name Blu-ray is derived from the blue-violet
  laser it uses to read and write to the disc.
• The e was intentionally left out of the name
  due to trademark restrictions

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CHARACTERISTICS OF BLU-RAY

• Life Span
• Content Protection
• Cost
• Capacity
• Robustness of disc
• Compatible

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Life Span

• In the case of ordinary discs, the disc life is
  less .
• In the rewritable versions, as re-writing is done
  repeatedly to one area of the disc most probably,
  the inner perimeter limiting the disc life.
• BDFS (Blu-ray Disc File Structure is designed so
  as to avoid this problem, by using a system that
  uses free disc spaces with equal frequency

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Content Protection

• Strongest content and copy protection schemes
  ever developed
• Incorporation of Robust copy mechanism

Cost

• Long term Profitability model for content
• Providers
• Cheapest Production cost

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Capacity

• The Blu-ray disc enables the recording, rewriting
  and playback of HD video up to 27 GB of data on a
  single sided single layer. It is enough to put
  2.5 hours of HDTV recording on it. It also can
  record over 13 hours of standard TV broadcasting

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Robustness of Disc

• Stronger resistance to scratches and fingerprints
  The protective layer is hard enough to prevent
  accidental abrasions and allows fingerprints to
  be removed by wiping the disc with a tissue.

Compatible

• The BD drives are designed to be backward
• compatible, i.e. CDs and DVDs work equally well
  with the BD drives.

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Principal BD Specifications
Capacity 23.3 25 27GB (single layer)
Wave length of the laser 405nm
Numerical Aperture of the objective lens 0.85
Data transfer rate 36Mbps
Thickness of the disc 1.2mm
Diameter of the center hole 15mm
Recording method Phase change
Data track Groove recording
Visual data MPEG-2 video
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Comparison of CD,DVD and B D specification
Parameter CD
DVD BD . Disk
diameter 120 mm 120 mm
120 mm Disk thickness
1.2 mm 1.2 mm 1.2 mm
Laser wavelength 780 nm 650
nm 405 nm Numerical aperture
0.45 0.60 0.85
Minimum pit length 0.83 um 0.4 um
0.138 um Data rate 1.2 Mb/sec
11 Mb/sec 36 Mb/sec Number of sides
one -----
one or two Number of data layers
One ----- One
or two Data capacity 680 MB
4.7 GB (1L) 27 GB

8.5 GB (2L)

1 7 GB (2L/2S)
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Blu-ray disc and CDs /DVDs
(Comparison Between Blu-ray n others)

• 1 DVD 5 to 10 CDs
• 1 Blu-ray 5 to 10 DVDs !!!!!!
• Usage of a blue instead of a red laser
• Improved lens specifications
• Backward compatibility

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Blu-ray Disc Applications

• High definition television recording
• High definition video distribution
• High definition camcorder archiving
• Mass data storage

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High definition television recording

• The Blu-ray Disc format offers consumers the
  ability to record their High Definition
  television broadcasts in their original quality
  for the first time, preserving the pure picture
  and audio level as offered by the broadcaster.
• Next level in home entertainment, offering an
  unsurpassed user experience Since Blu-ray Disc
  format incorporates the strongest copy protection
  algorithms of any format or proposal to date, the
  format allows for recording of digital broadcasts
  while meeting the content protection demands of
  the broadcast industry.

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High Definition Video Distribution

• Blu-ray Disc format can store High Definition
  video in the highest possible quality, without
  need to compromise on picture quality.
• Depending on the encoding method, there is room
  for more than seven hours of the highest HD
  quality video. There is even room for additional
  content such as special features and other bonus
  material to accompany the High Definition movie.
• The Blu-ray Disc movie format greatly expands on
  traditional DVD capabilities, by incorporating
  many new interactive features allowing content
  providers to offer an even more incredible
  experience to consumers.

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High Definition Camcorder Archiving

• With its unprecedented storage capacity, allows
  for the HD video recorded with an HD camcorder to
  be converted and recorded
• Storage capabilities, without the risk of tape
  wear

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Mass Data Storage

• The growing number of broadband connections
  allowing consumers to download vast amounts of
  data

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Conclusion

• Very soon BDs will replace CDs and DVDs
• THANK YOU